1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
/* GPIO Library interface
*
* COPYRIGHT (c) 2009.
* Cobham Gaisler AB.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifndef __GPIOLIB_H__
#define __GPIOLIB_H__
#ifdef __cplusplus
extern "C" {
#endif
/* GPIO Config of one GPIO port */
struct gpiolib_config {
char mask; /* 0=Masked/1=Unmasked IRQ */
char irq_level; /* Edge or Level triggered IRQ */
char irq_polarity; /* Polarity of IRQ */
};
#define GPIOLIB_IRQ_EDGE 0
#define GPIOLIB_IRQ_LEVEL 1
#define GPIOLIB_IRQ_POL_LOW 0
#define GPIOLIB_IRQ_POL_HIGH 1
/* Libarary initialize function must be called befor any other */
extern int gpiolib_initialize(void);
/*** User Interface ***/
extern void *gpiolib_open(int port);
extern void *gpiolib_open_by_name(char *devName);
extern void gpiolib_close(void *handle);
/* Show the current status one or all GPIO ports in the system.
* Int port is port nunber, if port = -1 selects all ports.
*
* If port != -1, handle is used to get port.
* If port != -1, handle == NULL, then port is used as port number
*/
extern void gpiolib_show(int port, void *handle);
extern int gpiolib_set_config(void *handle, struct gpiolib_config *cfg);
extern int gpiolib_set(void *handle, int dir, int val);
extern int gpiolib_get(void *handle, int *inval);
extern int gpiolib_irq_clear(void *handle);
extern int gpiolib_irq_enable(void *handle);
extern int gpiolib_irq_disable(void *handle);
extern int gpiolib_irq_mask(void *handle);
extern int gpiolib_irq_unmask(void *handle);
extern int gpiolib_irq_force(void *handle);
extern int gpiolib_irq_register(void *handle, void *func, void *arg);
/*** Driver Interface ***/
struct gpiolib_info {
char devName[64];
};
struct gpiolib_drv_ops {
int (*config)(void *handle, struct gpiolib_config *cfg);
int (*get)(void *handle, int *val);
int (*irq_opts)(void *handle, unsigned int options);
int (*irq_register)(void *handle, void *func, void *arg);
int (*open)(void *handle);
int (*set)(void *handle, int dir, int outval);
int (*show)(void *handle);
int (*get_info)(void *handle, struct gpiolib_info *pinfo);
};
#define GPIOLIB_IRQ_ENABLE 0x01
#define GPIOLIB_IRQ_DISABLE 0x02
#define GPIOLIB_IRQ_CLEAR 0x04
#define GPIOLIB_IRQ_FORCE 0x08
#define GPIOLIB_IRQ_MASK 0x10
#define GPIOLIB_IRQ_UNMASK 0x20
struct gpiolib_drv {
struct gpiolib_drv_ops *ops;
};
/* Register a GPIO port */
extern int gpiolib_drv_register(struct gpiolib_drv *drv, void *handle);
#ifdef __cplusplus
}
#endif
#endif
|
